The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Optimal Pilot Sequence Design based on Chu sequences for Multi-cell Environments

다중 기지국 환경에서의 MIMO-OFDM 시스템을 위한 최적 파일럿 시퀀스 설계 방법

  • 강재원 (연세대학교 전기전자공학과) ;
  • 이두호 (연세대학교 전기전자공학과) ;
  • 변일무 (연세대학교 전기전자공학과) ;
  • 김광순 (연세대학교 전기전자공학과)
  • Published : 2009.11.30
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Abstract

In this paper, the channel estimation and pilot sequence design technique of multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems in multi-cell environments are studied for situations in which the inter cell interference (ICI) is the dominant channel impairment. We design pilot sequence aiming at minimizing mean square error and propose the channel estimation technique correspond to the designed pilot sequences. The proposed pilot sequences employ the sequences with good correlation properties such as Chu sequence and through simulations, it is shown that channel estimation algorithm using designed pilot sequence is effective for mitigating the ICI.

본 논문에서는 기지국간 간섭이 큰 다중기지국 환경에서 multiple-input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) 시스템을 위한 파일럿 시퀀스 설계 방법 및 채널 추정 기법을 제안한다. 제안 파일럿 시퀀스의 경우 평균 제곱 오류치 (Mean Square Error)를 최소화시키며, 설계된 파일럿에 적합한 채널 추정 방법을 제안한다. 제안된 파일럿 시퀀스 및 채널 추정 기법은 추 시퀀스의 상관관계 특성을 이용해 설계되며 모의실험을 통해 설계된 파일럿 시퀀스를 이용한 채널 추정 기법이 기지국간 간섭을 완화에 효과적임을 보여준다.

Keywords

References

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